Hi,

Can anyone recommend a good way to display the current position of a cursor? I can get the value easily enough, but would like to display it as a floating number near the axis that follows the cursor

Is this something that's possible?

Many thanks,
Neil

Hi Plamen,

Yes - in this case you have to implement the following steps:

1. Intercept the mouse move event fired by the control.

2. Transform the passed view coordinates to scale coordinates.

The following code snippet shows how to achieve this:

  private void Form1_Load(object sender, EventArgs e)
  {
   NCartesianChart chart = (NCartesianChart)nChartControl1.Charts[0];
   chart.MinDockZoneMargins = new NMarginsL(45, 0, 0, 0);

   NBarSeries bar = new NBarSeries();

   bar.Values.Add(10);
   bar.Values.Add(20);
   bar.Values.Add(30);

   chart.Series.Add(bar);

   nChartControl1.MouseMove += new MouseEventHandler(nChartControl1_MouseMove);
  }

  void nChartControl1_MouseMove(object sender, MouseEventArgs e)
  {
   NHitTestResult result = nChartControl1.HitTest(e.X, e.Y);

   if (result.Chart != null)
   {
    NCartesianChart chart = (NCartesianChart)result.Chart;

    NStandardScaleConfigurator scale = chart.Axis(StandardAxis.PrimaryY).ScaleConfigurator as NStandardScaleConfigurator;
    scale.CustomLabels.Clear();

    NViewToScale2DTransformation transform = new NViewToScale2DTransformation(nChartControl1.View.Context, chart, (int)StandardAxis.PrimaryX, (int)StandardAxis.PrimaryY);
    NPointF point = new NPointF(e.X, e.Y);

    NVector2DD pointScale = new NVector2DD();

    transform.Transform(point, ref pointScale);

    NCustomValueLabel label = new NCustomValueLabel();
    label.Value = pointScale.Y;
    label.Text = label.Value.ToString("N2");
    scale.CustomLabels.Add(label);

    nChartControl1.Refresh();
   }
  }

Hope this helps - let us know if you meet any problems or have any questions.

Best Regards,
Nevron Support Team